Paper-feeding machine.



No. 655,435. Patented 'g. 7, |900.

T. c. DEXTER.

PAPER FEEDING MACHINE.

(Application led Sept. 24, 1898.)

4 Sheets-Sheet l,

(No Model.)

// 4 ATTORNEYS m: 'scams Pmns ce., Hom-Uma wAsmNuToN. D c.

10.655,435. PatentedAug. 7, |900. T. c. DEXTER.

PAPER FEEDlN-G MACHINE.

(Application filed Sept. 24, 1898.)

WITNESSES: INVENTOR mi nonms PETERS w. Pnoraufnajwunmurun, v. c,

No. 655,435. Patented Aug. 7, |900. T. C. DEXTER.

PAPER FEEDING MACHINE.

(Application led Sept. 2li, 1.8?8.)

4 Shasta-Sheet 3,

(No Model.)

WITNESSES: 4 l INVENTOR Q7 'y W w mi I 1 m Norms versus oo.. mom-umn.. wAsnmGvow. u, c.

No. 655,435. Patentedmug. 7, |900.

T. c. DEXTER.

PAPER'FEEDING MACHINE.

(Anvlcation led Sept. 24, 1898.)

4 Sheets-Sheet 4,

(No Model.)

. ,l oo

Uivrran STATES PATENT Orrin-s,

TALBOT C. DEXTER, OF PEARL RIVER, NEWT YORK. j

PAPER-FEEDING MACHINE,

SPECIFICATION forming part of Letters Patent N o. 655,43 5, dated August 7, 1900. Applications@ september 24, 189s. Serin N0. 691,755. (No model.)

To @ZZ wtont it' may concern.-

Be it known that I, TALBOT C. DEXTER, a citizen of the United States, residing at Pearl River, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Paper-Feeding Machines, of which thefollowing is a specification.

My invention relates to improvements in sheet-buckling mechanism for paper-feedin g machines which are particularly applicable to the form of such mechanism covered in my application for Letters Patent filed August 5, 1898, Serial No. 687,880. I have accordingly represented my improvements in con,- nection with the machine covered by said application, Serial No. 687,880, in the accompanying drawings, in which- Figure 1 is a rear end elevation of a ma-` chine embodying my improvements. Fig. 2 is a plan View of same. Fig. 3 is a horizontal sectional View taken on the line 3 3 of Fig. 1, on a larger scale. Fig. 4 is a perspective view of the parts constituting my present invention.

1 1 are parts of the main side frames of the paper-feeding machine upon which the supporting-frame of myimproved sheet-bucklin g mechanism is mounted.

2 2 are the longitudinallyfextending buckler-supporting bars,which are rigidly secured adjacent to their rear ends in brackets 3 3, which are in turn securely bolted to the inner face of the side frames 1 1.

5 5 are longitudinally-extending buckleroperating shafts journaled at their forward endsin the longitudinally-adj ustable brackets 6 6, which are Asupported upon the bars 2 2 and secured in adjusted position by tap-bolts 7 7. The shafts 5 5 are journaled at their rear ends in suitable bearings 8 8.

9 10 represent,Worm-gearing, the gear 9 be the ends ofthe bar 15 in the bifurcated lugs 6". Y

20is a casting mounted upon the bar l5 and adjustable thereon transversely of the pile of sheets.

' 21 are tap-bolts threaded into suitable openings formed in the bosses of casting 2O and engaging the bar 15 for clamping the casting or bracket 2O in any desired adjusted position. A

25 is a vertically-adjustable bracket arm or slide, Whichis vertically movable in theguideway formed in the rear face of the casting'20 and confined in said guidewayy by the guideplates 26, which are secured to the face of the casting by screws 27. The bracket or slide l25 is formed With an outwardly-projecting interiorly-threaded lug 28, through which passes a vertical screw 29, journale'd at its upper end in a plate 30, secured to the casting 20. The Screw 29 is provided With a crank 31 or other suitable operating means. It will be observed that by revolving the screw 29 the slideor bracket 25 will be moved up or down in the guideway formed in the casting 20, and as the operating parts of the sheet buckling mechanism are supported from the bracket or slide 25 (as hereinafter described) said parts will also be moved up or down, according to the rotation of the screw 29. At the lower end of the sliding bracket 25 is formed a4 horizontally-extending plate or arm 35, upon therear face f which is formed the integral horizontal flanges 36, forming, with the plate 35,4 a dovetail guideway extending in a horizontal direction.

40 is the reciprocating buckler slide or carriageof dovetail vertical crosssection, which operates in the guideway formed by the anges 36. Projecting from the rear face of the slide or carriage 40 is a bolt or journalpin 45, upon which is j ournaled the bucklingfin ger 50,having secured in its forward bifurcated end tlie block orroll 51, of soft rubber or other suitable frictional material IOO 52 is a torsional spring mounted upon the pin or bolt 45.

60 is the buckler-operating rock-arm, journaled upon and projecting upwardly from the pin or bolt 45.

65 is apitman journaled at one en d to a pin G6, projecting from the upper end of the rockarm G0 and journaled at its opposite end to a crank 67, keyed to or formed integral with a short rotary sleeve G8, which is journaled upon a pin or bolt 68a, secured in the head G9 and the bracket 70, which is suitably secured to the vertically-adjustable slide 25.

80 is the holding-down foot or clamp, formed at the forward end of an arm 82, which is journaled upon a bolt 83, projecting rearwardly from the plate 35 (of slide 25) below the reciprocating buckler-carriage 40.

84 is a torsional spring mounted upon the bolt 83 for the purpose of holding the shoe or clamp 80 normally down upon the paper for holding the pile intact.

89 is a pin projecting forwardly from one side of the arm 82 of the holding-clamp, and 90 is a vertical rod or pitman connected at its lower end to the pin 89 and journaled at its upper end to the outer end of a lever 92, which is journaled upon a bolt 93, supported in the bracket 25, formed integral with the slide 25. The lever 92 carries at its inner end an antifriction-roller 94, which operates upon the periphery of an approximately-semicircularv cam 95, keyed to or formed integral with the short rotary sleeve 68, above referred to. By the operation of the rotary cam 95 upon the lever 92 the clamping-plate 8O is intermittently elevated from the pile of sheets to allow the top sheet to be buckled and drawn from beneath the clamping-plate.

100 is an arm or lever journaled upon the bolt 83 alongside the arm 82 and having formed at its inner free end a socket 101, in which is adjustably supported a small block of rubber 102, held in constant yielding en` gagement with the top of the pile of sheets,

\ said block resting upon the pile adjacent to gages a pin 139, which extends through rockshaft 133. The spring 135 tends to move rock-shaft 133 in its bearing in one direction.

142 is a rock-arm keyed to rock-shaft 133, close to the bearing of bracket 25, and 140 is an approximately-semicylindrical cam keyed to or formed integral with rotary sleeve 68, (adjacent to cam 95,) which is in constant engagement with `an antifriction-roll 141, journaled in the end of rock-arm 142. The action of cam 140 upon rock-arm 142 is to allow spring 135 to intermittently act upon rockshaft 133 for the purpose which will presently appear.

134 is a rock-arm freely journaled upon rock- 'shaft133, adjacent to rockarm 142, and 180 is a torsional spring coiled upon rock-shaft 133 and engaging at one end a pin 134 on rockarrn 134, and at its other end a pin 181 of an adjustable collar 181, adjustably secured to the rock-shaft 133 in the same manner as collar 137 is secured. The rock-arm 134 has hinged to its downturned end an elongated channel-bar 182, having securely clamped in it a narrow bar or block of rubber 183, which is supported parallel to the length of the feeding-machine in contact with the top of the pile.

184 is a weight secured to the upper face of bar 182, near its rear end, to hold the rear end of rubber block 183 more intimately in contact with the pile than the forward edge for the purpose hereinafter explained.

The rock-arm 142, keyed to rock-shaft133,

has a projecting integral finger 142, adapted' rock-arm 142 is intermittently disengaged The cam 140 is approximately semicircular in shape and is placed upon the sleeve 68 in opposite relation to cam 95, so that when the holding-down linger or clamp 8O is elevated from the pile by the operation of cam the pressure of spring 135 will be exerted upon the rubber block 183, and when clamp 80 is in engagement with the pile the pressure of spring 135 will be restrained by rock-arm 142, engaged by cam 140, the rubber block 183 being held inengagement with the pile at such moments only by the pressure of spring 180. The spring 135 is by preference made stronger than the spring 180. The

slight rocking of shaft 133, under control of cam 140 and rock-arm 142, not only removes and applies the pressure of spring 135, butit also decreases and increases the pressure of the spring 180 upon the rock-arm 134, as will be clear from the drawings. The forward movement of the buckling-linger is accomplished with the holding-down finger or clamp 8O elevated and the rearward movement with the clamp in engagement with the pile. The rubber block 183, supported by spring-pressed arm 134, constantly engages the pile and constitutes a tail-gripper, which engages the under sheet or sheets just in rear of the rear edge of the top sheet as the latter moves IIO IIS

forward under the action of the feeding-off and sheet-separating devices hereinafter referred to.

Keyed to or formed integral with the rotary sleeve 68 is a sprocket-wheel 150, by which said rotary sleeve is driven.

151 is an adjustable or extensible strut or brace adjustably secured at its lower end to the bearing part 69, through which bolt or pin 68 extends, and rigidly secured at its upper end to a head 152i, supporting a short shaft or pin 153. The pin GS journals the head 69 to the bracket 70 of the buckler-frame It will be observed that the brace or strut 151 can be shortened or lengthened.

Journaled upon the short shaft or pin 153 is a sprocket-wheel 160, which is supported by said shaft 153 in the same vertical transverse plane as the sprocket 150.

161 is an endless sprocket-chain passing around the sprocket-wheels 150 and 160 for driving the former from the latter.

165 is a second sprocket-wheel upon the short shaft 153, alongside of and secured to the sprocket-wheel 160.

166 is an adjustable transversely-extending strut or brace rigidly secured at one end to a bearing-head 169, through which the shaft 153 extends, and adjustably secured at its other end to a bearing 170, journaled upon the shaft 5 and secured to the bracket 6 of the supporting-bar 2.

171 is a sprocket-wheel having spline connection with the shaft 5, so as to be adjustable longitudinally thereof.

175 is a sprocket-chain passing around the sprocket-wheels 171 and 165. The sprocketwheels 160 and 165 are arranged to rotate t0- gether upon shaft 153, the former being driven by the latter.

From this structure it will be observed that the rotation of shaft 5 will be directly transmitted to the rotary sleeve 68, the extensible driving mechanism allowing for any adjustment of the buckling mechanism transversely or vertically with relation to the pile of sheets.

The sheet-buckling mechanisms and coperating tail-grippers are duplicated, one set being arranged at each side of the machine in position to operate upon the rear edge of the pile. The pile of paper P is supported upon an adjustable support or platform P.

The machine described constituting my invention is designed to be employed in combination with the essential ,parts of a paperfeeding machine, the feeding-off devices of any suitable construction being represented at F F, and sheet-separators at the delivery end of the machine being represented at S S. Sheet-delivery mechanism (not shown) is also employed.

The operation of the machine is as follows: The sheet is buckled at the two rear corners by the simultaneous inward or forward movement of the buckling-lingers, the holdingclamps SO being elevated and the tail-grippers 183 being in engagement with the pile under the combined tension of both springs 135 and 180. The sheets are buckled against' the tailgrippers. Immediately after the buckling of the sheet the clamps 8O engage the pile, the buckling-ngers move back, the tension of springs 135 is removed from the tail-grippers, allowing them to remain in engagement with the pile under the light tension of spring 180, and the feeding-off ngers F start the top buckled sheet forward, dragging it part way from the pile till its rear edge passes partly under the tail-grippers, the pile being held by the clamps SO. Immediately after this step in the operation the clamps 8O are elevated from the pile and the tension of springs 135 applied to the tail-grippers to hold them more firmly into engagement, and the sheet is fed forward farther by the action of separators S S, which drag the sheet from under the tail-grippers and place the sheet in position to be taken from the machine by the delivery mechanism. The tail-grippers eifectivel \T hold back any under sheet or sheets which may have been buckled with the top sheet.

The weighted rear ends of the tail-grippers are more firmly held in engagement with the pile than the forward ends, so as to effectively engage the rearwardly-projecting edges of the under sheets, the gripper-bars being attached to their supporting rock-armsV 1311 near their forward ends in furtherance of this object, and the hinge connections allowing a slight downward inclination of the rear ends.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a paper-feeding machine, the combination of a support fora pile of sheets, means for effecting a preliminary separation of the top sheet from the pile, means for moving the top sheet upon the pile, and a tail-gripper comprising an elongated rubber block in con-.

stant engagement with the pile arranged parallel with the direction of movement of the sheet, and a weight engaging the rear end of the elongated tail-gripper, substantially as set forth.

2. In a paper-feeding machine, the combination of a support for a pile of sheets, suitable sheet-buckling mechanism, and means for moving a buckled sheet forward on a pile, with a tailgrippercomprisinga spring-pressed arm supporting a rubber block, a second spring, and means for intermittently applying the pressure of the second spring to the spring-pressed arm for augmenting the pressure of the rubber block, substantially as set forth.

3. In a paper-feeding machine, the combination of a support for a pile of sheets, suitable sheet-buckling mechanism, and means for movin ga sheet forward upon the pile, with a tail-gripper constantly engaging the pile and comprising a rock-shaft, a rock-arm journaled upon the rock-shaft and supportinga rubber block, means of engagement between the rock- IOO IIO

IZO

arm and rock-shaft, a torsional spring operating upon the rock-shaft, and means for operating the rock-shaft for intermittently applying the pressure of the torsional spring upon therock-arm, substantially as set forth.

4. In a paper-feeding machine, the combination of suitable sheet-buckling mechanism, and means for moving a buckled sheet forward on a pile, Witha tail-gripper comprising a rock-shaft 133, a rock-arm 134 journaled upon rock-shaft 133 and supporting a rubber block 183, a spring 180 connected at one end to shaft 133 and at its other end engaging rock-arm 134, a spring 135 attached at one end to a stationary point and at its other end to the rock-shaft 133, a rock-arm 142 keyed to rock-shaft 133, a cam 140 arranged to engage rock-arm 142, and means of engagement between rock-shaft 133 and rock-arm 134, substantially as and for the purpose set forth.

5. In a paper-feeding machine, the combination of a support for a pile of sheets, a reciprocating sheet-buckling finger, a holdingclamp, arotary member operatively connected with the buckling-finger, a cam on the ro tary member, a rock-arm connected with the holding-clamp and engaged by said cam, a

tail-gripper in constant engagement with the arm 0f the spring device, and means for mov? ing sheets upon the pile, substantially as and for the purpose set forth.

6. In a paper-feeding machine, the combination of a support for a pile of sheets, means for effecting a preliminary separation of the top sheet from the pile, means for moving the top sheet upon the pile, and a tail-gripper comprising a rock-shaft, and an elongated rubber block attached near its forward end to the rock-arm and supported in constant engagement with the pile arranged parallel With the direction of movement of the sheet, and a Weight engaging the rear end of the elongated tail-gripper, substantially as set forth.

TALBOT C. DEXTER.

Witnesses:

WM. E. KNIGHT, M. V. BIDGoon. 

